Electric cable system



May 25, 1937. c. E. BENNET? ELECTRIC CABLE SYS' I'EM Original Filed Dec. '7, 1935 Patented May 25, 1937 UNITED S ATES 2,oa1,zes

'Emc'rmc CABLE srsrnu' Charles E. Bennett, Bidgewood, N. 1., assignor to The Okonite-Callender Cable Company, Incor-v porated, Paterson, N. 1., a corporation of New Jersey Original application December 'z, 1935, Serial No.

Divided and this application August 13, 1936, Serial No. 95,821

I '4' Claims. This invention is directed to electric distribution systems particularly well adapted forjuse provided for dissipating the heat generated in 15 the system having particular reference to the heat generatedby electric losses in the transformers. This insures best operating conditions at all times.

This application is a division of my copending apgication Serial. No. 53,344, filed December 7,

In the drawing: I

Fig. l is a view in elevation, more or less diagrammatic in character, of a cable system embodying my invention; and

Fig. 2 is a part sectional elevational view of the construction employed in Fig. 1. v

Referring to the drawing in detail, I d'esignates a pipe line adapted to be buried in the 30 ground which encloses the cable conductors 2 and transformers 3 of the system. It will be observed from the drawing that that part of the pipe line in which the transformers 3 are mounted is lowered withrespect to the level or plane of the main part of the pipe line.

The transformers, as will be seen from Fig. 2, are mounted in the pipe line in suitable brackets 4, these brackets in the construction shown functioning as baiiies for the oil or other insu- 40 lating fluid 1 with which the pipe line is filled, The cable conductors 2 and'transformers i are immersed in this fluid, the fluid is preferably maintained under static pressure sumciently high materially to increase its dielectric strength, for- 45 example, five atmospheres minimum. and the the outer side of the baiiie pistes tothe' trans-,

former side.

, At the upper part of the baiiies l I provide short lengths of pipe I, these pipes lying, within 55 the pipe line and extending a short distance outwardly from thetransformer locations. The pipes terminate within the pipe line, as shown at I, at a suitable distance from the transformers 3. v I

It will be quite apparent that in this embodiment of my invention a thermal siphon effect is obtained, the oil or other fluid 'i immediately about the transformers 3 and which, is heated by the electric losses in the transformers moves outwardly away from the transformers through the pipes 9, the heat in this oil being dissipated by the pipes 9 being immersed in the relatively cooler oil in the pipe line remote from the transformers, the oil returning to-the oil in the pipe line at the ends of the pipe 9 and flowing back to the transformers again. i

It will be apparent that the present invention provides an" electric distribution system in which the conductors and transformers of the system are enclosed in a pipe line containing oil or other insulating fluid in which the: conductors and transformers are immersed, the transformers being immersed in the same oil as the conductors, means being provided for permitting of move-- ment of the insulating fluid away from the transformers for dissipation of the heat generated by electric losses in the transformers. 1 What I claim is:--- 1. A- buried electric distribution system com prising in combination a pipe line. insulated cable conductors in the pipeline, a transformer in the pipe line electrically connected to said conductors, an insulating fluid in the pipe line in which said conductors and transformer are immersed, baffles in the pipe line at each side of the transformer, provided adjacent the bottom with means. for permitting of the movement of the insulating fluid from the outer side of the baflles to the transformer side of the bailles, and open-ended pipes passing through said baiiles adjacent the 40 top thereofand extending away from the baffies, said pipes being enclosed by and terminating'within said pipe line. 2. A buried electric distribution system comprising in combination a pipe line, insulated cable conductors in the pipe line. a transformer in the pipe line electrically connected tosaid conductors, an insulating fluid in the pipe line in which said conductors and transformer are immersed.

said fluid being under .superatmospheric static pressure, baiiles in the pipe line at each side of the transformer, provided adjacent the bottom with means for permitting of the movement of the insulating fluid from the outer side of the" baiiies to the transformer side of the baiiies, "and as 2 a,oa1,ses

open-ended pipes passing through said bodies adjacent the top thereof and extending away from the battles, said pipes being enclosed by and terminating within said pipe line.

5 3. A buried electric distribution system comprising in combination a pipe line, insulated cable conductors in the pipe line. a transformer in the pipe line electrically connected to said conductors, an insulating fluid in the pipe line in which said 10 conductors and transformer are immersed, the pipe line at the transformer beingiower than the main part of the pipe line, baiiles in the low part of the pipe line at each side of the transformer, said badies being provided adjacent the is bottom thereoi with means for permitting of movement of the insulating fluid through the baffles toward the transformer, and open-ended pipes passing through said baflies "adiacent the top thereof and extending away from the baiiies,

20 said pipes being enclosed by and terminating within said pipe line.

4. A buried electric distribution system oomprising in combination a pipe line, insulated cable conductors in the pipe line, a transformer in the pipe line electrically connected to said conductors, an insulating fluid in the pipe line 5 in which said conductors and transformer are immersed, said fluid being under superatmospheric static pressure, the pipe line at the transformer being lower than the main part of the pipe line, baiiies in the low part of the pipe line at each 10 side of the transformer, said baflies being provided adjacent the bottom thereof with means for permitting of movement of the insulating fluid through the baiiles toward the transformer, and open-ended pipes passing through said baiiies 15 adjacent the top thereof and extending away from the baiiies, said pipes being enclosed by and terminating within said pipe line.

CHARLES E. BENNETT. 2g 

